Heat-regulating device.



No. 824,723. PATENTED JULY 3, 1906.

A. JOHNSTON.

HEAT RBGULATING DEVICE.

-2 SHEETS-SHEET 1.

APPLICATION FILED AUGJB, 1904.

ARCHIBALD JOHNSTON,

K BETHLEHEM YSTEEL COMPANY,

" fiooaPoR rIoN OF PENNSYLVANIA.

OF BETHLEHEM, ,"ENNS I VANiAiAs'sm oaTo 0F. BETHLEHEM, PENNSYLVANIA, A

, IHEAT-REGULATIVNG" DEVICE.

To all-whom, it may concern:

' .Beitknownthat a. citizenof the United States, residing at =-Bethleh em, in the countyof Northampton,

5 State of Pennsylvania, have invented certain new and useful Improvements in Heat-Regula ting Devices, of which .the following is a specification:

'--T his invention relates to heat-regulating xo-"devices for'furnaces, and especially for'that regenerative furnaces, and has for its object the provision ,ibe'r along eachside of which extends the agj longitudinal regenerating gas-chamber B and 'theregenerating air-chamber O. The regenferatingigaachambers may be connected by -;any suitab1e means, as flues D, with a source Iofigas. while the air-chambers may be coninctdby fines E with a source of air. The "-lconnections of the air and gas flues with the sources of air and gas may be controlled by the usual reversin -valves, whereby when theflfluesD and E, eading to one side of the 5ffi1rnace-chamber, are in connection with the sourcesthe flues leading to the other side of the chamber are connected with the stack F. The" result of this arrangement, as is well known,';isthat the air and gas after passing through theregenerating-chambers upon one "i sideare discharged into-the furnace-c amber ipo'nathat side, whereupon having been pre- -v-'1ouslyheated inthe regenerating chambers they combine and in their passage through the furnacechamber heat the. contents 1 1 other side of the furnace-c amber into the .regeneratingchaunbers, in which heat remaining in the products of combustion is extracted and retained. The products then pass on to the stack. At regular intervals the' reversing-valves above referred to are thrown, so that the flow of air and figas Specification of Letters Patent. Application filed August 18, 1904. Serial Ila. 221,269.

I, ARCHIBALD JOHNSTON,

the accompanying drawings, of-

thereof. Thefgases then ass] out of the- Patented July 3, 1906.

the heat which has been stored in a regenerative chamberv by the gases of combustion during one period of.operation is absorbed by the gases to be burned in a succeeding period.' Theapparatus thus far describedis well known, and it is thought unnecessary that it be described in further detail. Hitherto, however, the means for regulating the heating of material within the furnacechamber have been T inferior; According to the present invention means are provided whereby all the material within the furnace may be heated uniformly Whether the bodies to be heated are ofthe same or difierent sizes and also whereby the material may be heated without causing it to providing means whereby the heating fluid, which in the present instance is that produced by the combustion of gas and air, may

na'ce-chamber' and with relation to the objects or material to beheated. This may be accomplished, as shown in the accompanying drawings, by providing a plurality of entrance-ports 1 and 2 for the gas conveyed from the regenerating-chamber B by the passage 3. Corresponding to each of the ports 1 whiclifis conveyed from, the regenerating chamber 0 by passages 6 and 7. In the present instance'the ports-5 and 2 have a common inlet 20. In most forms of regenerative fur- .naces and in that shown the material to be heated will be placed upon the floor of the furnace. For'this reason air and gas ports are located at different distances from the 'floor, so that the heating fluid may be made to pass either through the lower portion of the furnace-chamber, and thus into contact -with or close to the material to be heated, or throughthe upper portionof the furnacechamber and out of contactwith the material below the current of gases, so that the heating of the latter is .accomplisherhby radiation. In the latter case with ion is preventbe effected by means of valves 8 andv 9, controlling the..gas-passage, and valves 10, 11,

through the furnace is reversed, and therebybe caused to change its path through the furregardless of become oxidized. This is accomplished by and 2 for the gas are ports 4 and-5 for air,

IOO

ed, and thereby the formation of scale on the The amount and direction of the heating 'fluid I lateral ports land 4.

12, and 13, controlling the air-passages. The valves 9, 12, and 13 are located between the upper and lower ports, while the valves 3, l0, and 12 are located below the lower ports. It will be obvious that if valves 8, 10, and 11 be opened while yaives 9, 12, an'd 13 are closed the heating fluid will be directed through the lower ports 1 and 4 and. along the floor of the furnace-chamber. If now the valves 9, l2, and 13 be opened, the gas and air will flow through the upper ports and across the upper part of the furnace-chamber, taking a direct upward course instead of passing through the The air and gas supply is regulated in quantity' by the lower valves 8, 10,'and 11, and by means of the upper valves 9, 12, and 13 the air and gas is directed tothe upper or lower outlets, or both, as may be desired. v

The description of the fines, valves, and ports has been made with reference to one side of the furnace only; but since the two sides are alike this description applies equally to each.

The flues, valves, and ports described upon one side of the furnacechamber, with a similar arrangement upon the opposite side of the chamber, constitute a section. The furnace comprises several of these sections longitudinally arranged. (See Figs. 2 and 3.) Since each of the sections has its own valves, the stream of heating fluid through it may be regulated independently of the other sections. In this way a plurality of independently-regulable streams of heating fluid are obtained. The stream in one section'may be caused toflow along the floor, while the streams in any or all of the other sections maybe directed near the ceiling of the chamber. It will thus be seen that byproperly adjusting the valves of the various sections the heat may be varied in the different sections. In this way the heat can be varied both vertically and longitudinally of the furnace to suit the size or nature ofmaterial heated.

While I have illustrated my invention in fluid to said chamber, and means for changing the path of each of said streams independently of the others, for the purpose set forth.

2. In a regenerative furnace, the combination with a furnace-cham.her, of means for supplying a longitudinally-arranged series of streams of heating fluid and means for changing the path of each of said. streams independently of the others, for the purpose set forth.

In a regenerative furnace, the combination with a furnace-chamber, of inea f1 supp ying a longitiulinally-arranged streams of heating fluid, and means wheres) each of said streams of heating fluid may be directed into said chamber at difi 'erent elevations independently of the others, for the purpose set forth.

4. In a regenerative furnace, the combination with the fu rhace-chamber and air and gas heating chambers, of a plurality of passages leadin from the air and gas heating chambers to each side of the furnace-chamber, means for regulating the low of air and gas through said passages, outlets for said passages at different elevations, and means for directing the air and gas either to the upper or lower I outlets, whereby different amounts of heat may be simultaneously supplied to different parts of said furnace-chamber.

5. A regenerative furnace divided into a plurality of sections, each of said sections having at one side a plurality of gas-ports at different elevations and corresponding airports, similar ports upon the opposite side ofthe furnace, and controlling means for the ports upon each side of the furnace whereby the air and gas may be directed to ports in either -section and at either elevation.

6. The combination with a single furnace chamber, of a plurality of ports at different elevations on each side of said chamber, means for supplying heating fluid. to eithe port on either side of said chamber, each of said. ports being also adapted for the exit of gases of combustion, whereby the heating .fluid may be directed to different elevations in the chamber. and the products of combus tion withdrawn at different elevations, for the purpose set forth.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

ARCHIBALD JOHNSTON.

Witnesses:

R. S. VAN HORN, W. L. YoNs. 

